. Diptera Brachycera. Brachycera. PIITHIRIA. 285 considerabl}^ longer tlian 2Md, ovd vein forked, the 2nd sub- marginal cell elengate; anterior cross-vein at about middle of discal cell; anal cell closed just before wiug-border. Range. World-wide. Life-history unknown. Tlie adults occur on bare patches of ground among low-growing Mowers, and on Compositse. 227. Phthiria gracilis, Wall-. Phthii-ia (/racilis, Walker, Ins. Sauud., Dipt. pt. '6, p. 194 (1852). S 5 • Head in <S black ; vertex very small, dark grej, with three or four short black hairs; ocelli dark ruby-i'ed, shining; eyes closel
. Diptera Brachycera. Brachycera. PIITHIRIA. 285 considerabl}^ longer tlian 2Md, ovd vein forked, the 2nd sub- marginal cell elengate; anterior cross-vein at about middle of discal cell; anal cell closed just before wiug-border. Range. World-wide. Life-history unknown. Tlie adults occur on bare patches of ground among low-growing Mowers, and on Compositse. 227. Phthiria gracilis, Wall-. Phthii-ia (/racilis, Walker, Ins. Sauud., Dipt. pt. '6, p. 194 (1852). S 5 • Head in <S black ; vertex very small, dark grej, with three or four short black hairs; ocelli dark ruby-i'ed, shining; eyes closely contiguous for nearly all the distance to the small protruding triangular dark grey frons, which bears a few black hairs; mouth-opening extremely large, extending from immediately below base of anrennte to lower ])art of head, black ; face and under part of head black, both with long black hairs : antennse black ; 1st and 2nd joints as long as wide, subglobular, with two or three short black hairs each, 3rd joint narrower, flattened, about two and a half times as long as Hrst two together, with microscopic depressed pubescence and a short st3de-like prolonga- tion at tip on upper side; proboscis as long as vAdiole body, black, slender, gently curved; palpi half as long as head, porrect, black. Head in $ bright orange-yellow ; frons at vertex about half as. Fig. 20.—Fhthiria gracilis, Walk., wing. wide as at level of antenna?, where it foruis nearly one-third the width of the head ; a broad black stripe from vertex to above antennae, sometimes wholly interrupted in middle ; ocelli distinct; sides of face between antennae and eyes blackish ; occiput black, broadly orange behind eye-margins, the colour not extending behind the vertex. in cJ dark blackish brown, with a little short dark brown pubescence, which is longer towards the sides of the dorsum ; scutellum concolorous. In $ greenish grey, lower margin of dorsum rather broadly though somewdiat irregu- larly pale
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1920
